10 laboratories in United States are accredited by A2LA under ISO/IEC 17025 to perform ASTM D421 testing. From the accredited scope text: “ASTM D421 Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants ASTM D422 Particle-Size Analysis of Soils ASTM D698 Laboratory Compaction Characteristics of So” “ASTM D421 Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constant ASTM D422 Particle Size Analysis of Soils ASTM D558 Moisture-Density (Unit Weight) Relations of” “ASTM D421 ASTM D422 Permeability of Granular Soils ASTM D2434”
Acton, MA, US
ASTM D421 Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constant ASTM D422 Particle Size Analysis of Soils ASTM D698 Moisture-Density Relations (Standard Proctor) ASTM D854 Specific Gravity of Soil
Houston, TX, US
ASTM D421 (Withdrawn 2016) Dry Preparation of Soil Samples for Particle-Size Analysis ASTM D422 (Withdrawn 2016) Particle-Size Analysis of Soils ASTM D698 Laboratory Compaction Characteristics of Soil Using Standard Effort ASTM D854
Houston, TX, US
ASTM D421 Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants ASTM D422 Particle Size Analysis of Soils ASTM D558 Moisture-Density (Unit Weight) Relations of Soil-Cement Mixtures ASTM D698 L
Seattle, WA, US
ASTM D421 Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants ASTM D422 Particle-Size Analysis of Soils ASTM D698 Laboratory Compaction Characteristics of Soil Using Standard Effort ASTM D85
Bloomington, MN, US
ASTM D421 (Withdrawn 2016) Standard Practice for Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants ASTM D422 (Withdrawn 2016) Particle Size Analysis of Soils ASTM D558/D558M Moisture-Densit
Bellingham, WA, US
ASTM D421 (Withdrawn 2016) Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants ASTM D422 (Withdrawn 2016) Particle-Size Analysis of Soils ASTM D698 Laboratory Compaction Characteristics
Corpus Christi, TX, US
ASTM D421 (Withdrawn 2016) Dry Preparation of Soil Samples for Particle Size Analysis and Determination of Soil Constants ASTM D422 (Withdrawn 2016); TxDOT 110E Particle Size Analysis of Soils ASTM D558 Moisture-Density Relations of
Vancouver, WA, US
ASTM D421 (Withdrawn 2016) Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants ASTM D422 (Withdrawn 2016) Particle-Size Analysis of Soils ASTM D698 Laboratory Compaction Characteristics
PASCO, WA, US
ASTM D421 ASTM D422 Permeability of Granular Soils ASTM D2434
Houston, TX, US
ASTM D421 Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constant ASTM D422 Particle Size Analysis of Soils ASTM D558 Moisture-Density (Unit Weight) Relations of Soil-Cement Mixtures ASTM D698 Moist
This page is a fixed slice of the register: every ASTM D421 scope we hold for United States. Search narrows it further by city, accreditation body, or a term from the scope text itself.
Search labs in United StatesAmerican Association for Laboratory Accreditation (A2LA) is the primary accreditation body issuing ISO/IEC 17025 accreditation for testing laboratories in United States.
ISO/IEC 17025 is the international standard for the competence of testing and calibration laboratories. Accreditation to this standard provides independent confirmation that a laboratory operates a quality management system and is technically competent to produce valid results within its declared scope.